2001 · ソースブック（プレイを拡張するルール／オプション）
GURPS Spirits
This roleplaying supplement explores the spirit realm and its inhabitants, including angels, demons, djinn, dryads, ghosts, loas, manitou, rakshasas, and other beings drawn from traditions around the world. It provides campaign guidance for characters who see, serve, use, or oppose spirits, along with expanded ritual magic rules for spirit-mediated spellcasting. The material supports horror campaigns as well as historical fantasy, modern supernatural adventures, and science fiction.
スキルベース（スキルを購入または獲得）ポイント制（ポイントを割り振ってスキルや能力を得る）ダイス（主にd6）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。